Test directory: Metanephrines, 24Hr Urine

Ordering Code 301
Test Name Metanephrines, 24Hr Urine
Alias Metanephrines, Fractionated
Preferred Specimen Urine, 24 Hour
Preferred Container 24 Hour Urine Container
Ok to add preservative after collection.
Other Specimen/Container Urine without preservative is acceptable only if pH<6 and sample is shipped frozen.
Optimum Volume 10 mL
Collection Instructions Keep refrigerated during collection
Patient age & sex required on requisition
Patient should avoid caffeine (coffee, tea, energy drinks, etc.) and nicotine (tobacco) for 3 days prior to specimen collection. It is preferable for the patient to be off medications for 3 days prior to collection. Medications which are alpha agonists (Aldomet), alpha blockers (Dibenzyline) should be avoided 18-24 hr prior to collection. Common antihypertensives (diuretics, ACE inhibitors, calcium channel blockers, alpha and beta blockers) cause minimal or no interference.
Handling Instructions Adjust to pH<3 with 6N HCl.
Transport Requirements Oahu: Refrigerated
Airline: Refrigerated
Specimen Stability Unpreserved urine:
Ambient: Unacceptable
Refrigerated: Unacceptable
Frozen: 30 Days
Preserved urine:
Ambient: 10 Days
Refrigerated: 14 Days
Frozen: 90 Days
Rejection Criteria Urine collected with boric acid
Avail. Stat NO
Analytic Time Up to 6 Days
Methodology Chromatography/Mass Spectrometry
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of June 29, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Total Volume ALL See report.
Metanephrine ALL See report.
Normetanephrine ALL See report.
Total Metanephrines ALL See report.